from flask import current_app, jsonify
from flask import render_template
from flask import request
from flask import session

from info import constants
from info import redis_store
from info.models import User, News, Category
from info.utils.response_code import RET
from . import index_blu


@index_blu.route('/news_list')
def news_list():
    """获取首页新闻数据"""
    #     1 获取参数
    # 新闻的分类id cid 默认为1代表是最新的新闻
    cid = request.args.get("cid", "1")
    page = request.args.get("page", "1")
    per_page = request.args.get("per_page", "10")
    #     2 校验参数
    try:
        page = int(page)
        cid = int(cid)
        per_page = int(per_page)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    filters = [News.status == 0]
    if cid != 1:
        filters.append(News.category_id == cid)

    #     3 查询数据
    try:
        paginate = News.query.filter(*filters).order_by(News.create_time.desc()).paginate(page, per_page, False)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据查询错误")
    # 取到当前也的数据
    news_model_list = paginate.items
    total_page = paginate.pages
    current_page = paginate.page
    #      将模型对象列表转换为字典列表
    news_dict_li = []
    for news in news_model_list:
        news_dict_li.append(news.to_basic_dict())
    data = {
        "total_page": total_page,
        "current_page": current_page,
        "news_dict_li": news_dict_li
    }
    return jsonify(errno=RET.OK, errmsg="OK", data=data)


@index_blu.route('/')
def index():
    #   向redis里面保存
    """显示首页
    1 如果用户已经登陆， 将当前登陆用户的数据传递到末班中，供模板显示

    """
    user_id = session.get("user_id", None)
    user = None
    if user_id:
        try:
            user = User.query.get(user_id)
        except Exception as e:
            current_app.logger.error(e)

            # 右侧的新闻排行 news_list 是一个对象
    news_list = []
    # 这个列表里面存储的是六个对象[News1, News2,.....]
    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(constants.CLICK_RANK_MAX_NEWS)
    except Exception as e:
        current_app.logger.error(e)

    # 定义一个空的字典列表，里面装的就是字典
    news_dict_li = []
    # 遍历对象的列表，将对象的字典加到字典列表中 to_basic_dict是转换对象为列表
    for news in news_list:
        news_dict_li.append(news.to_basic_dict())

    categories = Category.query.all()
    category_li = []
    for category in categories:
        category_li.append(category.to_dict())

    data = {
        "user": user.to_dict() if user else None,
        "news_dict_li": news_dict_li,
        "category_li": category_li

    }
    return render_template("news/index.html", data=data)


@index_blu.route('/favicon.ico')
def favicon():
    return current_app.send_static_file('news/favicon.ico')